<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2010 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// $Id: ContentReplaceBehavior.class.php 2420 2011-12-16 15:33:55Z liu21st $

/**
 +------------------------------------------------------------------------------
 * 系统行为扩展 模板内容输出替换
 +------------------------------------------------------------------------------
 */
class ContentReplaceBehavior extends Behavior {
    // 行为参数定义
    protected $options   =  array(
        'TMPL_PARSE_STRING'=>array(),
    );

    // 行为扩展的执行入口必须是run
    public function run(&$content){
        $content = $this->templateContentReplace($content);
    }

    /**
     +----------------------------------------------------------
     * 模板内容替换
     +----------------------------------------------------------
     * @access protected
     +----------------------------------------------------------
     * @param string $content 模板内容
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    protected function templateContentReplace($content) {
        // 系统默认的特殊变量替换
        $replace =  array(
            '__TMPL__'      => APP_TMPL_PATH,  // 项目模板目录
            '__ROOT__'      => __ROOT__,       // 当前网站地址
            '__APP__'       => __APP__,        // 当前项目地址
            '__GROUP__'   =>   defined('GROUP_NAME')?__GROUP__:__APP__,
            '__ACTION__'    => __ACTION__,     // 当前操作地址
            '__SELF__'      => __SELF__,       // 当前页面地址
            '__URL__'       => __URL__,
            '../Public'   => APP_TMPL_PATH.'Public',// 项目公共模板目录
            '__PUBLIC__'  => __ROOT__.'/Public',// 站点公共目录
        );
        // 允许用户自定义模板的字符串替换
        if(is_array(C('TMPL_PARSE_STRING')) )
            $replace =  array_merge($replace,array_change_key_case(C('TMPL_PARSE_STRING'),CASE_UPPER));
        $content = str_replace(array_keys($replace),array_values($replace),$content);
        return $content;
    }

}